Coahoma County, Mississippi
The dominant drainage class is Somewhat poorly drained and the dominant hydrologic group is D (very slow infiltration, high runoff). This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Coahoma County, Mississippi.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Alluvial land, frequently flooded | 48K | Somewhat poorly drained | D | Very limited | Very limited |
| Dowling clay (sharkey) | 33K | Very poorly drained | D | Very limited | Very limited |
| Alligator clay, 0.5 to 3 percent slopes | 28K | Poorly drained | D | Very limited | Very limited |
| Water | 23K | Not rated | Not rated | ||
| Dundee very fine sandy loam, 0 to 3 percent slopes, rarely flooded | 22K | Somewhat poorly drained | C | Very limited | Very limited |
| Sharkey clay, 0.5 to 3 percent slopes, rarely flooded | 22K | Poorly drained | D | Very limited | Very limited |
| Dubbs very fine sandy loam, 0 to 3 percent slopes, rarely flooded | 20K | Well drained | B | Very limited | Somewhat limited |
| Dundee silty clay loam, 0.5 to 3 percent slopes | 19K | Somewhat poorly drained | C | Very limited | Very limited |
| Dowling soils (sharkey) | 18K | Very poorly drained | D | Very limited | Very limited |
| Dundee silt loam, 0 to 3 percent slopes, rarely flooded | 17K | Somewhat poorly drained | C | Very limited | Very limited |
| Forestdale silty clay loam, 0.5 to 3 percent slopes | 17K | Poorly drained | D | Very limited | Very limited |
| Forestdale silty clay, 0.5 to 3 percent slopes | 13K | Poorly drained | D | Very limited | Very limited |
| Bosket very fine sandy loam, 0 to 3 percent slopes (dubbs) | 10K | Well drained | B | Somewhat limited | Very limited |
| Commerce silt loam, 0 to 3 percent slopes | 8K | Somewhat poorly drained | C | Very limited | Very limited |
| Alligator clay, 0 to 0.5 percent slopes | 8K | Poorly drained | D | Very limited | Very limited |
| Sharkey clay, 0 to 0.5 percent slopes, rarely flooded | 7K | Poorly drained | D | Very limited | Very limited |
| Tunica silty clay, 0 to 3 percent slopes, rarely flooded | 6K | Poorly drained | D | Very limited | Very limited |
| Borrow Pit | 5K | Not rated | Not rated | ||
| Commerce silty clay loam, 0 to 3 percent slopes | 5K | Somewhat poorly drained | C | Very limited | Very limited |
| Marsh | 4K | Not rated | Not rated |
What This Means
Building & Foundations
About 87% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 84% of soils are rated "very limited" for septic absorption fields. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.